Question

23. For the following pairs of compounds, give one IR absorption band that could be used to distinguish between them. (4 points) (a) CH3COCH3 and CH3OCH3 a keto carbonyl absorption at ~ 1720 cm-1 no carbonyl absorption (b) CH3CO2H and CH3CHO a broad carboxylic acid OH absorption at 2500 to 3100 cm-1

          23. For the following pairs of compounds, give one IR absorption band that could be used to distinguish between them. (4 points)
(a) CH3COCH3 and CH3OCH3
a keto carbonyl absorption at ~ 1720 cm-1
no carbonyl absorption
(b) CH3CO2H and CH3CHO
a broad carboxylic acid OH absorption at 2500 to 3100 cm-1

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23. For the following pairs of compounds, give one IR absorption band that could be used to distinguish between them. (4 points)
(a) CH3COCH3 and CH3OCH3
a keto carbonyl absorption at 1720 cm-1
no carbonyl absorption
(b) CH3CO2H and CH3CHO
a broad carboxylic acid OH absorption at 2500 to 3100 cm-1

Added by John J.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Madhur L

06/01/2023

Step 1

For CH3COCH3 (acetone) and CH3OCH3 (dimethyl ether), we can distinguish them by the carbonyl (C=O) stretching band. Acetone has a carbonyl group, while dimethyl ether does not. Show more…

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For the following pairs of compounds, give one IR absorption band that could be distinguished between them:

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